IDEA + maven + spring boot + scala + oracle + mybatis + druid scala java混合开发环境搭建

我就是我 2022-05-25 01:14 128阅读 0赞

# IDEA + maven + spring boot + scala + oracle + mybatis + druid scala java混合开发环境搭建 #

*  IDEA + maven + spring boot + scala + oracle + mybatis + druid scala java混合开发环境搭建
    
     *  demo地址
     *  为什么要用scala
     *  环境
     *  初始化spring boot项目
     *  添加依赖
     *  添加插件
     *  application.properties
     *  创建两张表用来测试
     *  配置/resources/generator/mybatis-generator-config.xml
     *  DataSource和Mybatis配置
     *  Service
     *  Controller
     *  启动并测试

## demo地址 ##

[clyoudu/spring-boot-scala-demo][clyoudu_spring-boot-scala-demo]

## 为什么要用scala ##

*  为什么要用`scala`？是`Java`不好用还是不够难？可能仅仅是想装逼？
 *  其实是项目中要用`scala`写`spark`程序，所以有`scala`和`java`混合开发的需求，干脆研究一下纯`scala`能不能搭建这样的开发环境。
 *  最后放弃了完全使用`scala`的方式，因为`scala`的环境下无法完美使用`mybatis + druid`，当然也可以实现，但是映射、配置、事务等代码不是很优雅，`mybatis-scala`在`maven`仓库中只更新到`scala 2.11`，`github`上也不是很活跃，应该是需求量不大，说不定有很多坑，既然是`java scala`混合使用，不妨用`java`来实现`ORM`相关代码。
 *  `scala`一般使用`java Persistence API`来实现数据库操作的。
 *  `mybatis-scala`相关连接：[github mybatis/scala][github mybatis_scala]；[mvnrepository][]；[mybatis-scala-core  
    ][mybatis-scala-core]，这里有很多示例代码，看了基本能用`scala`实现`ORM`，包括事务等。

## 环境 ##

*  `IDE`：`IntelliJ IDEA 2017`
 *  `JDK`：`1.8`
 *  `OS`：`Win10`
 *  `BT`：`Maven`
 *  `scala`：`2.12.4`
 *  `spring boot`：`2.0.1.RELEASE`
 *  `maven`：`3`
 *  `oracle`：`11.2.0.4`

## 初始化spring boot项目 ##

可以直接从`IDEA`创建，也可以从[https://start.spring.io/][https_start.spring.io]创建一个基础的项目，这里使用`IDEA`直接创建。

首先确保有`Spring boot`插件：  
![这里写图片描述][70]

然后创建一个简单的`spring boot`项目：  
![这里写图片描述][70 1]

![这里写图片描述][70 2]

![这里写图片描述][70 3]

![这里写图片描述][70 4]  
这里根据自己的需求选择，也可以不选后面自己写。

![这里写图片描述][70 5]

![这里写图片描述][70 6]

如果已有`maven`环境，可以删除`mvn`相关的文件和文件夹。

## 添加依赖 ##

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
        <relativePath/> 
    </parent>
    
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RC1</spring-cloud.version>
        <scala.version>2.12.4</scala.version>
    </properties>
    
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    
    <dependencies>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
    
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>
    
        
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>${scala.version}</version>
        </dependency>
    
        
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>11.2.0.4</version>
        </dependency>
    
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.9</version>
        </dependency>
    
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>
    
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>4.1.3</version>
        </dependency>
    
        
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
    </dependencies>

## 添加插件 ##

<build>
        <plugins>
            
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
    
            
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>3.3.2</version>
                <executions>
                    <execution>
                        <id>compile-scala</id>
                        <phase>compile</phase>
                        <goals>
                            <goal>add-source</goal>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>test-compile-scala</id>
                        <phase>test-compile</phase>
                        <goals>
                            <goal>add-source</goal>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <recompileMode>incremental</recompileMode>
                    <scalaVersion>${scala.version}</scalaVersion>
                    <args>
                        <arg>-deprecation</arg>
                    </args>
                    <jvmArgs>
                        <jvmArg>-Xms64m</jvmArg>
                        <jvmArg>-Xmx1024m</jvmArg>
                    </jvmArgs>
                </configuration>
            </plugin>
    
            
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/generator/mybatis-generator-config.xml
                    </configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.42</version>
                    </dependency>
                    <dependency>
                        <groupId>org.mybatis</groupId>
                        <artifactId>mybatis</artifactId>
                        <version>3.4.5</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

## application.properties ##

spring.datasource.driverClassName=oracle.jdbc.driver.OracleDriver
    spring.datasource.url=jdbc:oracle:thin:@192.168.0.193:1521:single
    spring.datasource.username=scott
    spring.datasource.password=tiger
    
    #连接池配置
    spring.datasource.initialSize=5
    spring.datasource.minIdle=5
    spring.datasource.maxActive=20
    #连接等待超时时间
    spring.datasource.maxWait=60000
    #配置隔多久进行一次检测(检测可以关闭的空闲连接)
    spring.datasource.timeBetweenEvictionRunsMillis=60000
    #配置连接在池中的最小生存时间
    spring.datasource.minEvictableIdleTimeMillis=300000
    spring.datasource.validationQuery=SELECT 1 FROM DUAL
    spring.datasource.testWhileIdle=true
    spring.datasource.testOnBorrow=false
    spring.datasource.testOnReturn=false
    # 打开PSCache，并且指定每个连接上PSCache的大小
    spring.datasource.poolPreparedStatements=true
    spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
    # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
    spring.datasource.filters=stat,wall,log4j
    # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
    spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

## 创建两张表用来测试 ##

CREATE TABLE "SYSTEM"."USER" ( "ID" NVARCHAR2(36) NOT NULL ENABLE, "USERNAME" NVARCHAR2(255) NOT NULL ENABLE, "PASSWORD" NVARCHAR2(255) NOT NULL ENABLE, "REGISTER_TIME" DATE NOT NULL ENABLE, PRIMARY KEY ("ID") ) NOCOMPRESS;

CREATE TABLE "SYSTEM"."USER_OPERATION_HISTORY" ( "ID" NVARCHAR2(36) NOT NULL ENABLE, "USER_ID" NVARCHAR2(36) NOT NULL ENABLE, "USERNAME" NVARCHAR2(255) NOT NULL ENABLE, "OPERATION_TYPE" NVARCHAR2(255) NOT NULL ENABLE, "OPERATE_TIME" DATE NOT NULL ENABLE, PRIMARY KEY ("ID") ) NOCOMPRESS;

## 配置/resources/generator/mybatis-generator-config.xml ##

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
    <generatorConfiguration>
    
        
        <classPathEntry location="C:/Users/vabsh/.m2/repository/com/oracle/ojdbc6/11.2.0.4/ojdbc6-11.2.0.4.jar" />
    
        
        <context id="test">
            
            <commentGenerator >
                <property name="suppressAllComments" value="true"/>
                <property name="suppressDate" value="false" /> 
            </commentGenerator>
    
            
            <jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@192.168.0.193:1521:single" userId="system" password="single" />
    
            
            <javaTypeResolver>
                
                <property name="forceBigDecimals" value="false"/>
            </javaTypeResolver>
    
            
            <javaModelGenerator targetPackage="github.chenlei.springbootscalademo.entity" targetProject="C:\github\spring-boot-scala-demo\src\main\java" >
                
                <property name="enableSubPackages" value="false"/>
                
                
            </javaModelGenerator>
    
            
            <sqlMapGenerator targetPackage="mapper" targetProject="C:\github\spring-boot-scala-demo\src\main\resources" >
                
                <property name="enableSubPackages" value="false" />
            </sqlMapGenerator>
    
            
            <javaClientGenerator targetPackage="github.chenlei.springbootscalademo.dao" targetProject="C:\github\spring-boot-scala-demo\src\main\java" type="XMLMAPPER" >
                
                <property name="enableSubPackages" value="false" />
            </javaClientGenerator>
    
            
            <table schema="SYSTEM" tableName="USER_OPERATION_HISTORY" enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>
            <table schema="SYSTEM" tableName="USER" enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>
    
        </context>
    </generatorConfiguration>

执行`mvn mybatis-generator:generate`或点击右侧工具栏`Maven Projects > spring-boot-scala-demo > Plugins > mybatis-generator > mybatis-generator:generate`，`mapper mapperxml entity`会自动创建在对应的包里。

后续的一些小改动：  
因为`USER`是`oracle`保留字，需要在`mapperxml`将`USER`替换为`"USER"`。  
在`XxxMapper`类上添加`@Mapper`注解。

## DataSource和Mybatis配置 ##

和`spring boot`配置数据源类似，只不过用的`scala`实现：

package github.chenlei.springbootscalademo.config
    
    import java.sql.SQLException
    import javax.sql.DataSource
    
    import com.alibaba.druid.pool.DruidDataSource
    import org.slf4j.LoggerFactory
    import org.springframework.beans.factory.annotation.Value
    import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties
    import org.springframework.context.annotation.{Bean, Configuration, Primary}
    
    /** * Create by IntelliJ IDEA * * @Author chenlei * @DateTime 2018/5/7 10:59 * @Description DruidDataSource */
    @Configuration
    @Primary
    class DruidDataSourceConfig extends DataSourceProperties {
      private val LOGGER = LoggerFactory.getLogger(classOf[DruidDataSourceConfig])
    
      @Value("${spring.datasource.url}")
      private val dbUrl : String = null
    
      @Value("${spring.datasource.username}")
      private val username : String = null
    
      @Value("${spring.datasource.password}")
      private val password : String = null
    
      @Value("${spring.datasource.driverClassName}")
      private val driverClassName : String = null
    
      @Value("${spring.datasource.initialSize}")
      private val initialSize : Integer = 0
    
      @Value("${spring.datasource.minIdle}")
      private val minIdle : Integer = 0
    
      @Value("${spring.datasource.maxActive}")
      private val maxActive : Integer = 0
    
      @Value("${spring.datasource.maxWait}")
      private val maxWait : Long = 0
    
      @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
      private val timeBetweenEvictionRunsMillis : Long = 0
    
      @Value("${spring.datasource.minEvictableIdleTimeMillis}")
      private val minEvictableIdleTimeMillis = 0
    
      @Value("${spring.datasource.validationQuery}")
      private val validationQuery : String = null
    
      @Value("${spring.datasource.testWhileIdle}")
      private val testWhileIdle : Boolean = false
    
      @Value("${spring.datasource.testOnBorrow}")
      private val testOnBorrow : Boolean = false
    
      @Value("${spring.datasource.testOnReturn}")
      private val testOnReturn : Boolean = false
    
      @Value("${spring.datasource.poolPreparedStatements}")
      private val poolPreparedStatements : Boolean = false
    
      @Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}")
      private val maxPoolPreparedStatementPerConnectionSize : Integer = 0
    
      @Value("${spring.datasource.filters}")
      private val filters : String = null
    
      @Value("{spring.datasource.connectionProperties}")
      private val connectionProperties : String = null
    
      @Bean //声明其为Bean实例
      def dataSource: DataSource = {
        val datasource: DruidDataSource = new DruidDataSource
        datasource.setUrl(this.dbUrl)
        datasource.setUsername(username)
        datasource.setPassword(password)
        datasource.setDriverClassName(driverClassName)
        //configuration
        datasource.setInitialSize(initialSize)
        datasource.setMinIdle(minIdle)
        datasource.setMaxActive(maxActive)
        datasource.setMaxWait(maxWait)
        datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis)
        datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis)
        datasource.setValidationQuery(validationQuery)
        datasource.setTestWhileIdle(testWhileIdle)
        datasource.setTestOnBorrow(testOnBorrow)
        datasource.setTestOnReturn(testOnReturn)
        datasource.setPoolPreparedStatements(poolPreparedStatements)
        datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize)
        try
          datasource.setFilters(filters)
        catch {
          case e: SQLException =>
            LOGGER.error("druid configuration initialization filter", e)
        }
        datasource.setConnectionProperties(connectionProperties)
        datasource
      }
    }

package github.chenlei.springbootscalademo.config
    
    import javax.servlet.{Filter, Servlet}
    
    import com.alibaba.druid.support.http.{StatViewServlet, WebStatFilter}
    import org.springframework.boot.web.servlet.{FilterRegistrationBean, ServletRegistrationBean}
    import org.springframework.context.annotation.{Bean, Configuration}
    
    /** * Create by IntelliJ IDEA * * @Author chenlei * @DateTime 2018/5/7 11:07 * @Description DruidMonitorConfig */
    @Configuration
    class DruidMonitorConfig {
      /** * 注册ServletRegistrationBean * * @return */
      @Bean
      def registrationBean: ServletRegistrationBean[StatViewServlet] = {
        val bean : ServletRegistrationBean[StatViewServlet] = new ServletRegistrationBean(new StatViewServlet, "/druid/*")
    
        /** 初始化参数配置，initParams **/
        //白名单
        bean.addInitParameter("allow", "127.0.0.1") //多个ip逗号隔开
    
        //IP黑名单 (存在共同时，deny优先于allow) : 如果满足deny的话提示:Sorry, you are not permitted to view this page.
        //bean.addInitParameter("deny", "192.168.1.73");
        //登录查看信息的账号密码.
        bean.addInitParameter("loginUsername", "admin")
        bean.addInitParameter("loginPassword", "123456")
        //是否能够重置数据.
        bean.addInitParameter("resetEnable", "false")
        bean
      }
    
      /** * 注册FilterRegistrationBean * * @return */
      @Bean
      def druidStatFilter: FilterRegistrationBean[_ <: Filter] = {
        val bean = new FilterRegistrationBean(new WebStatFilter)
        //添加过滤规则.
        bean.addUrlPatterns("/*")
        //添加不需要忽略的格式信息.
        bean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*")
        bean
      }
    }

package github.chenlei.springbootscalademo.config
    
    import java.util.Properties
    import javax.sql.DataSource
    
    import com.github.pagehelper.PageHelper
    import org.apache.ibatis.plugin.Interceptor
    import org.apache.ibatis.session.SqlSessionFactory
    import org.mybatis.spring.{SqlSessionFactoryBean, SqlSessionTemplate}
    import org.springframework.beans.factory.annotation.Autowired
    import org.springframework.context.annotation.{Bean, Configuration}
    import org.springframework.core.io.support.PathMatchingResourcePatternResolver
    import org.springframework.jdbc.datasource.DataSourceTransactionManager
    import org.springframework.transaction.annotation.TransactionManagementConfigurer
    
    /** * Create by IntelliJ IDEA * * @Author chenlei * @DateTime 2018/5/7 11:14 * @Description MybatisConfig */
    @Configuration
    class MybatisConfig extends TransactionManagementConfigurer{
    
      @Autowired
      private val dataSource : DataSource = null
    
      @Bean(name = Array("sqlSessionFactory"))
      def sqlSessionFactoryBean: SqlSessionFactory = {
        val bean = new SqlSessionFactoryBean
        bean.setDataSource(dataSource)
        bean.setTypeAliasesPackage("github.chenlei.springbootscalademo.entity")
        //分页插件,插件无非是设置mybatis的拦截器
        val pageHelper = new PageHelper
        val properties = new Properties
        properties.setProperty("offsetAsPageNum", "true")
        properties.setProperty("rowBoundsWithCount", "true")
        properties.setProperty("reasonable", "true")
        pageHelper.setProperties(properties)
        //添加插件
        bean.setPlugins(Array[Interceptor](pageHelper))
        //添加XML目录
        val resolver = new PathMatchingResourcePatternResolver
        try { //设置xml扫描路径
          bean.setMapperLocations(resolver.getResources("classpath:mapper/**/*.xml"))
          bean.getObject
        } catch {
          case e: Exception =>
            throw new RuntimeException("sqlSessionFactory init fail", e)
        }
      }
    
      @Bean(name = Array("sqlSessionTemplate"))
      def sqlSessionTemplate(sqlSessionFactory: SqlSessionFactory) = new SqlSessionTemplate(sqlSessionFactory)
    
      @Bean(name = Array("transactionManager"))
      override def annotationDrivenTransactionManager() = new DataSourceTransactionManager(dataSource)
    }

## Service ##

很多方法可以在一个`BaseService`里面定义和实现，因为`scala`可以重写`field`，所以结合泛型和字段重写能轻松实现模板方法，减少很多代码量，具体参考：[github.chenlei.springbootscalademo.service][]

## Controller ##

和`spring boot`实现类似，依然改成`scala`实现，具体参考：[github.chenlei.springbootscalademo.controller][]

## 启动并测试 ##

使用`postman`访问创建用户接口：`http://localhost:8080/user/create`  
![这里写图片描述][70 7]  
![这里写图片描述][70 8]  
![这里写图片描述][70 9]

访问`druid monitor`：`http://localhost:8080/druid`，`admin/123456`  
![这里写图片描述][70 10]  
![这里写图片描述][70 11]

[clyoudu_spring-boot-scala-demo]: https://github.com/clyoudu/spring-boot-scala-demo
[github mybatis_scala]: https://github.com/mybatis/scala
[mvnrepository]: https://mvnrepository.com/artifact/org.mybatis.scala
[mybatis-scala-core]: http://www.mybatis.org/scala/mybatis-scala-core_2.11
[https_start.spring.io]: https://start.spring.io/
[70]: /images/20220525/8980aacf85574d5f9d265166a4257933.png
[70 1]: /images/20220525/7e4d2029f6bc4f54a298eaea11224a87.png
[70 2]: /images/20220525/7ad08348317f4e32a9bf6a39fea387c1.png
[70 3]: /images/20220525/6845b2d9c1bc47c9b28938bbbba40f5c.png
[70 4]: /images/20220525/89757b402d6742ad9823f4b52f50da39.png
[70 5]: /images/20220525/27a3d50ca335409785e94a534aab7dc5.png
[70 6]: /images/20220525/e8a91c888597495c9361c7ef4c63b756.png
[github.chenlei.springbootscalademo.service]: https://github.com/clyoudu/spring-boot-scala-demo/tree/master/src/main/java/github/chenlei/springbootscalademo/service
[github.chenlei.springbootscalademo.controller]: https://github.com/clyoudu/spring-boot-scala-demo/tree/master/src/main/java/github/chenlei/springbootscalademo/controller
[70 7]: /images/20220525/6adbe246127341a6a7e186e289a4d5ff.png
[70 8]: /images/20220525/d0ca74486a4d43f5a12a0640f579c4dd.png
[70 9]: /images/20220525/82f310a6dbb941e8a4e028f86630751f.png
[70 10]: /images/20220525/f24bf24828b840ddb077abd1c32645fc.png
[70 11]: /images/20220525/8764b3872dd3457c87ef28b8cf6b72f2.png